Equalization Techniques for Distributed Space-Time Block Codes With Amplify-and-Forward Relaying
IEEE Transactions on Signal Processing
End-to-end performance of transmission systems with relays over Rayleigh-fading channels
IEEE Transactions on Wireless Communications
MIMO Configurations for Relay Channels: Theory and Practice
IEEE Transactions on Wireless Communications
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
On the capacity of MIMO relay channels
IEEE Transactions on Information Theory
IEEE Transactions on Wireless Communications
Effect of feedback delay on downlink amplify-and-forward relaying with beamforming
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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The amplify-and-forward (AF) relaying system considered here consists of a source node with M transmit antennas, and relay and destination nodes with a single antenna each. The closed-form expressions for the outage probabilities for maximum-ratio-transmission (MRT) at the source are presented for some specific values of M. Numerical results show that increasing M from 1 to 2 can achieve roughly a 3dB SNR gain, guaranteeing the same outage probability. However, we discover that for M ≥ 3, the additional gain compared to M = 2 decreases quickly as the SNR increases. Therefore, increasing M above 3 does not achieve significantly greater gain over M = 2 at high SNR.